?? chain2_split.c
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/*..........................................................................*//* *//* L a s t W a v e P a c k a g e 'dwtrans2d' 2.1 *//* *//* Copyright (C) 1998-2002 E.Bacry, J.Fraleu, J.Kalifa, E. Le Pennec, *//* W.L. Hwang , S.Mallat, S.Zhong *//* emails : lastwave@cmap.polytechnique.fr *//* fraleu@cmap.polytechnique.fr *//* kalifa@cmap.polytechnique.fr *//* lepennec@cmap.polytechnique.fr *//* mallat@cmap.polytechnique.fr *//* whwang@iis.sinica.edu.tw *//* szhong@chelsea.princeton.edu *//* *//*..........................................................................*//* *//* This program is a free software, you can redistribute it and/or *//* modify it under the terms of the GNU General Public License as *//* published by the Free Software Foundation; either version 2 of the *//* License, or (at your option) any later version *//* *//* This program is distributed in the hope that it will be useful, *//* but WITHOUT ANY WARRANTY; without even the implied warranty of *//* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *//* GNU General Public License for more details. *//* *//* You should have received a copy of the GNU General Public License *//* along with this program (in a file named COPYRIGHT); *//* if not, write to the Free Software Foundation, Inc., *//* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *//* *//*..........................................................................*/#include "lastwave.h"#include "extrema2d.h" /***************************************************//* split chain into three parts: chain, ext, and *//* newchain *//* chain -> (chain) (ext) (newchain) *//***************************************************/void W2_chain_split(CHAIN2 chain, EXT2 ext,CHAIN2 newchain){ if (ext == chain->first) { newchain->first = ext->next; chain->first = NULL; if(ext->next) ext->next->previous = NULL; ext->next = NULL; } else { newchain->first = ext->next; if(ext->previous) ext->previous->next = NULL; ext->previous = NULL; if(ext->next) ext->next->previous = NULL; ext->next = NULL; } ext->chain = NULL; ext->chain_index = -1;}/*****************************************************/ /** chain-> chain newchain and ext in newchain *//*****************************************************/void W2_chain_split_2(CHAIN2 chain, EXT2 ext,CHAIN2 newchain){ W2_chain_split(chain, ext, newchain); if(ext) { ext->next = newchain->first; if(newchain->first) newchain->first->previous = ext; newchain->first = ext; ext->chain = newchain; }}
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